[ASan][Test-Only] Allow read of size 2 in strcmp.c test (#166179) Occasionally this test fails on Darwin due to `CHECK: READ of size 1` not matching the actual output `CHECK: READ of size 2`. This can happen when the memory before the string `s1` happens to match the first character of `s2`. This patch allows for `READ of size 2` to pass in order to account for the above circumstances. rdar://151317947
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